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KFF ! ',: FFFDER 2 SITE SETTING 2.1 SITE LOCATION The site is located in Township 1 North, Range 6 East, Section 8, Subsections H and G (extrapolated), Mount Diablo Baseline and Meridian according to the 1968 U.S. Geological Survey "Stockton West, California" 7.5-Minute Topographic Quadrangle Map. The property is located at an elevation of approximately 10 feet above mean sea level (msl). 2.2 CURRENT SITE USE AND VICINITY CHARACTERISTICS The project site currently has six Above Ground Storage Tanks (ASTs) associated with the Mel Rice Terminal located near the western most extent of Port Road A at the Port of Stockton. The ASTs are reportedly used for the storage of a commercial fertilizer solution. The storage capacity of the tanks ranges from approximately 100,000 gallons to 3,000,000 gallons. The ASTs are located in an area approximately 575 feet by 160 feet in size. The Stockton Deep Water Channel is north of the site and the San Joaquin River is adjacent to the west. East and south of the site are additional industrial areas of the port. 2.3 REGIONAL GEOLOGY The site is located within the Great Valley Geomorphic Province of California. The valley is approximately 400 miles long and averages about 50 miles wide, and comprises about 20,000 square miles. The valley has been filled with a thick sequence of marine and non-marine sediments from the late Jurassic to Holocene. The uppermost strata of the Great Valley represent, for the most part, the alluvial, flood, and delta plains of two major rivers (Sacramento and San Joaquin Rivers) and their tributaries. The valley deposits are derived from the Coast Ranges to the west and the Sierra Nevada to the east. Granitic and metamorphic rocks outcrop along the eastern and southeastern flanks of the valley. Marine sedimentary rocks outcrop along most of the western, southwestern, southern, and southeastern flanks; and volcanic rocks and deposits outcrop along the northeastern flanks of the valley. The valley geomorphology includes dissected uplands, low alluvial plains and fans, river flood plains and channels, and overflow lands and lake bottoms. The majority of the native sediments near the site consist of Miocene to Holocene continental rocks and deposits of a heterogeneous mixture of generally poorly sorted clay, silt, sand, and gravel. Some beds of claystone, siltstone, sandstone, and conglomerate are also present. According to the California Division of Mines and Geology, San Francisco-San Jose Quadrangle Map No. 5A, 1991, the subject site is underlain by the Pleistocene Modesto Formation. 43851.E01/ST05R158/DH:Iv Page 2 of 12 02005,Kleinfelder,Inc. February 9,2005